C++ Institute CPP-22-02 Online Practice Questions and Exam Preparation

C++ Institute CPP-22-02 Online Questions & Answers

• Question 51:

  What will happen when you attempt to compile and run the code below, assuming that file test.in contains the following sequence: 1 2 3?

  #include

  #include

  #include

  #include

  #include

  using namespace std;

  templatestruct Out {

  ostream and out;

  Out(ostream and o): out(o){}

  void operator() (const T and val ) {out<

  int main () {

  ifstream f("test.in");

  list l;

  for( ; !f.fail() ; ) {

  int i;

  f>>i;

  l.push_back(i);

  }

  f.close();

  for_each(l.begin(), l.end(), Out(cout));

  return 0;

  }

  Programwill output:

  A. 1 2 3
  B. 1 2 3 3
  C. no output
  D. compilation error
  E. program runs forever without output
  B. 1 2 3 3

• Question 52:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  using namespace std;

  class B { int val;

  public:

  B(int v):val(v){}

  int getV() const {return val;} bool operator < (const B and v) const { return val

  templatestruct Out {

  ostream and out;

  Out(ostream and o): out(o){}

  void operator() (const T and val ) { out<

  int main() {

  B t1[]={3,2,4,1,5};

  B t2[]={5,6,8,2,1};

  vector v1(10,0);

  sort(t1, t1+5);

  sort(t2, t2+5);

  set_difference(t1,t1+5,t2,t2+5,v1.begin());

  for_each(v1.begin(), v1.end(), Out(cout));cout<

  return 0;

  }

  Program outputs:

  A. 1 2 3 4 5 6 8 0 0 0
  B. 3 4 0 0 0 0 0 0 0 0
  C. 6 8 0 0 0 0 0 0 0 0
  D. compilation error
  E. 1 2 5 0 0 0 0 0 0 0
  D. compilation error

• Question 53:

  What happens when you attempt to compile and run the following code? #include

  #include

  #include

  #include

  using namespace std;

  class B { int val;

  public:

  B(int v):val(v){}

  int getV() const {return val;} bool operator < (const B and v) const { return val

  ostream and operator <<(ostream and out, const B and v) { out<

  templatestruct Out {

  ostream and out;

  Out(ostream and o): out(o){}

  void operator() (const T and val ) { out<

  int main() {

  int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};

  deque d1(t, t+10);

  sort(d1.begin(), d1.end());

  set s1(t,t+10);

  cout<

  return 0;

  }

  Program outputs:

  A. 1 0
  B. 1 1
  C. true true
  D. false false
  E. compilation error
  E. compilation error

• Question 54:

  Given three files: class.h, class.cpp and main.cpp containing small C++ project, which sentences are TRUE if you attempt to compile and run the program? Assume that the whole compiling environment is properly set.

  // File: main.cpp

  #include

  #include "class.h"

  using namespace std;

  int main()

  {

  A a;

  cout << a.getV() << endl;

  return 0;

  }

  //File: class.h

  #ifndef _CLASS_

  #define _CLASS_

  template

  class A {

  T_v;

  public:

  A() {}

  A(T v);

  T getV();

  };

  #endif

  //File: class.cpp

  #include "class.h" template A::A(T v):_v(v) {} template T A::getV() { return _v; }

  A. program will display: 0
  B. program will not compile
  C. program will display unpredictable number
  D. program willl be not linked
  D. program willl be not linked

• Question 55:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  #include

  using namespace std;

  void myfunction(int i) {

  cout << " " << i;

  }

  int multiply (int a) {

  return a*2;

  }

  int main() {

  int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };

  vector v1(t, t+10);

  set s1(t, t+10);

  transform(s1.begin(), s1.end(), v1.begin(), multiply);

  transform(v1.begin(), v1.end(), s1.begin(), multiply);

  for_each(s1.begin(), s1.end(), myfunction);

  return 0;

  }

  Program outputs:

  A. 20 10 18 12 4 8 14 16 6 2
  B. 2 4 6 8 10 12 14 16 18 20
  C. 4 8 12 16 20 24 28 32 36 40
  D. compilation error
  D. compilation error

• Question 56:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  #include

  using namespace std;

  int main() {

  int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};

  vector v1(t, t + 15);

  set s1(t, t + 15);

  pair::iterator, vector::iterator > resultSet = equal(s1.begin(), s1.end(), v1.begin());

  cout<<*resultSet.first<<" "<<*resultSet.second<

  }

  Program outputs:

  A. 2 4
  B. 4 2
  C. 0 5
  D. compilation error
  D. compilation error

• Question 57:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  using namespace std;

  class A {

  int a;

  public:

  A(int a) : a(a) {}

  int getA() const { return a; } void setA(int a) { this?>a = a; }

  operator int() const {return a;}

  };

  int main () {

  int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};

  set s (t,t+15);

  cout<

  return 0;

  }

  Program outputs:

  A. true
  B. false
  C. 1
  E. compilation error
  D

• Question 58:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  int main ()

  {

  std::vectorv1;

  for(int i = 10; i>0; i??)

  {

  v1.push_back(i);

  }

  std::vector::iterator it = v1.begin();

  int sum = 0;

  while(it != v1.end())

  {

  sum+=it++;

  }

  std::cout<<*v1.erase(v1.begin(),v1.end()?3)<<" "<

  return 0;

  }

  A. program outputs 3 55
  B. compilation error
  C. program outputs 3 45
  D. program outputs 7 55
  B. compilation error

• Question 59:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  using namespace std;

  class A {

  int a;

  public:

  A(int a) : a(a) {}

  int getA() const { return a; } void setA(int a) { this?>a = a; }

  };

  int main () {

  int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};

  deque d (t,t+15);

  int number = count(d.begin(), d.end(), 2);

  cout<< number<

  return 0;

  }

  Program outputs:

  A. 4
  B. 3
  C. 2
  E. compilation error
  A. 4

• Question 60:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  #include

  using namespace std;

  int main ()

  {

  int t[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

  vector v1(t, t + 10);

  deque d1(v1.begin(), v1.end());

  deque d2;

  d2 = d1;

  d2.insert(d1.rbegin(), 10);

  for(int i = 0; i

  {

  cout<

  }

  return 0;

  }

  A. program outputs: 0 1 2 3 4 5 6 7 8 9 10
  B. program outputs: 10 0 1 2 3 4 5 6 7 8 9
  C. program outputs: 0 1 2 3 4 5 6 7 8 9
  D. compilation error
  D. compilation error